Virtual Manipulative : Base Blocks Decimals

The virtual manipulative that I found was under the number and operations grade 6-8. It is called Base Block Decimals. I like this manipulative because it breaks down the process of the subtracting and adding decimals. If there is something that students hate just as much as fractions or more it would be decimals. The program goes from one decimal place to 3 decimal places. It uses blocks to represent the given problem and lets you choose the base of the blocks, from 2,3,4,5 and 10. What I also like the fact that it uses fractions to break up the columns. When adding decimals all you have to do is group the blocks. When subtracting you have to match the blue blocks and the red blocks to cancel each other out. The only problem with this is that when dealing with 3 decimal places the answers are wrong. It is a a good manipulative to start dealing with decimals.